孟加拉采购需求：数字溶解氧传感器，数字溶解氧电极，数字溶解氧探头，溶解氧仪，溶解氧探头，溶解氧传感器

I'm looking for an IoT Digital Optical Dissolved Oxygen Sensor with specific features that cater to environmental monitoring needs. Key requirements include compatibility with Modbus RTU over RS485 protocol and a power supply of DC12V. The sensor should utilize fluorescence measurement technology, ensuring easy maintenance and accuracy. This device is intended for various applications, particularly in sewage and river water monitoring, as well as in aquaculture settings. Could you please provide me with the pricing details and availability of this sensor model? Additionally, any information regarding lead time and warranty would be great. Looking forward to your prompt response!